Band-brake.



No. 837,299. PATENTED DEC. 4, 1906.

A. GRIBVES;

BAND BRAKE.

APPLICATION FILED FEB. 17. 1906.

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UNITED srni ns PATENT onFroE.

ALBERT GRIEVES, OF SPRINGFIELD, OHIO, ASSIGNOR TO INTERNATIONALHARVESTER COMPANY, A CORPORATION OF NEW JERSEY.

BAND-BRAKE.

Patented Dec. 4, 1906.

Application filed February l7 l 1906. Serial No. 301,531.

To all whom it nwgl con/writ.-

Be it known that I, ALBERT GRIEvEs, a citizen of the United States,residing at Springfield, in the county of Clark and State of Ohio, haveinvented certain new and useful Improvements in Band-Brakes, of whichthe following is a specification, reference being had to theaccompanying drawings, forming a part thereof.

My invention relates to brake mechanism applicable to hoisting-gear, andparticularly to the hoisting mechanism applied to haystackers.

It consists in suitable bed-pieces having sheaves or band-wheels mountedthereon and a band-brake mechanism operative to control the movement ofthe sheaves and also a cable-grip operative to prevent a too-rapidmovement of the hoistingrope, the object of the invention being toprovide a mechanism that may be conveniently manipulated and one thatwill be both powerful and effective in operation. I attain these objectsby the mechanism illustrated in the accompanying drawings, in whichFigure 1 is a plan view of the brake and sheave mechanism. Fig. 2 is aside elevation of Fig. 1 along line A B, and Fig. 3 is an end view ofFig. 1.

Like reference numerals represent the same parts throughout the severalviews.

1 and 2 represent portions of the bedframe members of a hay-stacker.

3 and 4 are sheaves journaled upon a cross-shaft 5, mounted upon theframe members, and 6 represents a band-rim integral with the sheave 4.

7 is a hand-lever pivotally mounted upon the cross-shaft 5 and providedwith an upwardly-curved extension 8, having means for attaching one endof the hoisting-cable 9 thereto, and laterally-projecting arm portions10 upon opposite sides thereof, adapted to contact with the framemembers 1 and 2 in a manner to limit a rocking movement of thehand-lever in one direction.

11 is a flexible band having one end secured to the hand-lever and,passing partially around the rim 6, has its opposite end secured to oneof the frame members. The cable 9 passes upward to suitable sheaveconnections mounted upon other operative parts of the hoisting mechanismand then downward around sheave 4, and it is de-' Any number of sheavesmay be used in the I mechanism in order to multiply the effective forceof the applied power as desired.

The cable is held in contact with the sheave 4 by means of the sheave13, journaled upon a fixed bearing 14, secured to the frame members uponone side of the sheave 4, and 15 is a grip-sheave journaled upon theupturned extension 8 of the hand-lever and adapted to engage the cable,as shown in Fig. 2.

In operation, the power being applied to the cable 12, the hand-leverwill swing to the position shown by dotted lines in Fig. 2, releasingthe band-brake 11 and the cablegripping sheave 15. When the power is released, the load, operating through the cable 9, automatically operatesthe brake mechanism to sustain the load, and when it is desired to lowerthe load or the load-carrying mechanism the operator by manipulating thehand-lever may effectively control the movement thereof.

What I claim, and desire to secure by Letters Patent, is

1. In a brake mechanism, the combination of a sheave journaled in asuitable frame, a cable having its power end operatively engaging saidsheave and its load end engaging a sheave in a manner operative ashoisting means, a hand-lever pivotally mounted adj acent saidfirst-mentioned sheave, cable-gripping means mounted upon saidhand-lever and operative to grip the power end of said cable againstsaid sheave when said lever is moved in one direction, the load end ofsaid cable being secured to said hand-lever and operative to move saidlever in a direction to grip said cable when the power is releasedtherefrom.

2. In a band-brake, the combination of a sheave journaled in a suitableframe, a cable having its power end operatively engaging said sheave andits load end engaging a sheave in a manner operative as hoisting means,a band-wheel forming part of said first-mentioned sheave, and ahand-lever pivotally mounted adjacent thereto, a flexible band partiallysurrounding said band- Wheel and having one end secured to saidhand-lever and its opposite end secured to a fixed part of the mechanismand operative to oppose movement of said band-wheel when said lever ismoved in one direction, the load end of said cable being secured to saidhandlever and operative to move it in a direction to cause the flexibleband to engage the bandwheel when the power is released from the cable.

3. In a band-brake, the combination of a sheave journaled in a suitableframe, a cable having its power end operatively engaging said sheave andits load end engaging a sheave in a manner operative as hoisting means,a hand-lever pivotally mounted adj acent said first-mentioned sheave, abandwheel forming part of said sheave, a flexible band partiallysurrounding said band-wheel and having one end secured to said handleverand its opposite end secured to a fixed part of the mechanism andoperative to oppose movement of said band-Wheel when said lever is movedin one direction, cable-gripping means mountedupon saidhand-lever andoperative to grip the power end of said cable against the sheave whensaid lever is moved in the same direction, the load end of said cablebeing secured to said hand-lever and operative to move the lever in thesame direction when thepower is released from the cable.

4. In a brake mechanism, the combination of a sheave journaled in asuitable frame, 'a cable having its power end operatively engaging saidsheave and its load end engaging a sheave in a manner operative ashoisting means, a hand-lever pivotally'mounted adj acent saidfirst-mentioned sheave, cable-gripping means mounted upon saidhand-lever and operative to grip the power end of said cable against thesheave when said lever is moved in one direction, the load end of saidcable being secured to said hand-lever and operative to move said leverin a direction to grip said cable when the power is released therefrom,and means for limiting the movement of said lever in the oppositedirection.

5. In a brake mechanism for hay-stackers, the combination oflongitudinally-arranged frame members, a shaft secured to said framemembers, one or more sheaves journaled upon said shaft, a band-wheelintegral with one of said sheaves, and a cable having its power endoperatively engaging said sheaves and its load end passing aroundsheaves journaled upon a separate support, a hand-lever pivotedcoaxially with said first named sheaves, said lever extending beyond itspivotal connection, cable-gripping means carried by said extendedportion, and means for attaching the load end of said cable thereto,whereby the load operates the gripping means when the power is released.

In witness whereof I hereto aflix my signature in presence of twowitnesses.

ALBERT GRIEVES.

Witnesses:

HERBERT V. FLEMING, C. 0. R001.

